Canceling-stamp



(No Model.)

F.- E. GROTHAUS. Canceling Stamp.

No. 240,409. Patented April 19,1881.

mimesses N. PETERS. FNOTO-LITHOGRAPHER, WASNINGIONv D. (1

UNITED STATES PATENT OFFICE.

FREDERICK E. GROTHAUS, OF BOERNE, TEXAS.

CANCELlNG-STAM P.

SPECIFICATION forming part of Letters Patent No. 240,409, dated April 19, 1881.

Application filed February 2, 1881.

To all whom tt may concern Be it known that I, FREDERICK E. GRO- THAUS, a citizen of the United States, residing at Boerne, in the:county of Kendall and State of Texas, have invented new and useful Improvements in Stamp-Oancelers, of which the following is a specification.

This invention relates to that class of canceling devices embodying a revolving head, which is operated by a downward pressure upon the handle of the instrument.

The object of my invention is to provide a simple means for adjusting the roughened face of the revolving head in relation to the lower edge of the tixed casing inclosing the same.

This invention is illustrated in the accompanying drawings, in which Figure 1 represents a vertical longitudinal section. Fig. 2 is an inverted plan view. Fig. 3 is a cross-section on the line 00a, Fig. 1.

Similar letters indicate corresponding parts.

The letterA designates the revolving head,

I and B the handle, connected to the sliding nut G, which engages a screw-shank, D, on the revolving head, so that a downward pressure on the handle has the efl'ect of putting the head in motion. A spring, E, coiled on the shank of the handle, serves to return the same to its upper or normal position. The face f of the revolving head is preferably made of hard steel, and it is roughened in a similar manner to a coarse file, the furrows made for this purpose being arranged at an angle to each other, as shown in Fig. 2; hence, when the instrument is applied to usethat is to say, when the head A is brought in contact with the stamp to be canceled and revolved by the depression of the handle-the roughened face of the head sweeps over the stamp, so as to abrade or shave the same, and if the head is previously supplied with ink, as I intend it shall be, the ink is at the same time put on the stamp. In this manner the stamp is defaced beyond restoration by washing or otherwise, the ink being thoroughly diffused in the abraded portion of the (No model.)

stamp, but the body of the article is preserved, which is a desiratum'.

The revolving head A, together with the sliding nut O, is inclosed in a casing, G, which is open at both ends, the face of the revolving head being substantially flush with the lower end of this casing, and the latter being closed at its upper end by an annular-cap, h, encircling the shank of the handle B.

On the revolving head A are formed two shoulders, z'j, one of which rests upon an inwardly-projecting flange, 70, at the lower end of the casing G, while the other is surmounted by a ring, l, which encircles a plain portion of the shank of the revolving head, and is secured to the casing by set-screws n, passing through vertical slots 0 in the casing. By this arrangement of the revolving head A a washer can be placed between it and either the flange 70 or the ring I, for the purpose of adjusting the roughened face of the head relatively to the lower end of the casing G, so that the correct operation of this face is insured.

I do not broadly claim means for adjusting the revolving cutter of a stamp-canceler in relation to the lower face of the casein which the head revolves; but

I/Vhat I claim as new, and desire to secure by Letters Patent, is

In a stamp-canceler, the combination of the casing G, provided at its lower end with the inward-projecting flange, k, and with the vertical elongated slots 0 0, with the revolving head A, having the upper and lower flanges 'ij, the ring I, and the set-screws n a, passing laterally through the slots into the said ring, substautially as and for the purpose described.

In testimony whereof I have hereunto set my hand and seal in the'presence of two subscribing witnesses.

FREDERICK E. GROTHAUS. [n s] Witnesses:

H. G. FROEBEL, Jos. DIENGER. 

